A criterion to improve the efficiency of universal motors used in vacuum cleaners is presented; the lamination external sizes and the stack length are maintained unvaried. A mathematical model of the motor is derived, that provides the expressions of torque, current THD, Joule and core losses as a function of the magneto-motive forces and the pole flux. The model is validated by tests and the energy and cost savings related to winding data changing are evaluated. Then, a new lamination internal geometry is studied, that de-saturates rotor teeth, yokes and pole tips, thus increasing the performances.

Efficiency Improvement of Universal Motors Used in Domestic Appliances

DI GERLANDO, ANTONINO;PERINI, ROBERTO
2004-01-01

Abstract

A criterion to improve the efficiency of universal motors used in vacuum cleaners is presented; the lamination external sizes and the stack length are maintained unvaried. A mathematical model of the motor is derived, that provides the expressions of torque, current THD, Joule and core losses as a function of the magneto-motive forces and the pole flux. The model is validated by tests and the energy and cost savings related to winding data changing are evaluated. Then, a new lamination internal geometry is studied, that de-saturates rotor teeth, yokes and pole tips, thus increasing the performances.
2004
Proc. International Conference on Electrical Machines 2004
8392142802
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/256316
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